Primary finding
Probable cause
The pilot's loss of directional control while landing, which resulted in a ground loop.
Investigator assessment
Analysis narrative
The pilot was landing the tailwheel-equipped airplane in light crosswind conditions. He reported that after landing he was attempting to resolve a tailwheel shimmy when the airplane began to ground loop and exited the runway. The right main landing gear dug into soft dirt along the runway shoulder and the airplane nosed over. The airplane sustained substantial damage to the right wing. The pilot reported no preaccident mechanical malfunctions or failures of the airplane that would have precluded normal operation.